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Los Angeles City Attorney's Office spokesman Frank Mateljan tells E! News the younger Fishburne was arrested in February, for allegedly breaking into the home of the victim, (whose identity is being withheld for privacy reasons), forcing her into the bathroom and beating her repeatedly, causing "significant injuries."

She has since pleaded not guilty to simple battery and false imprisonment. But prosecutors say they're working on bringing additonal charges as well.

"There are currently two misdemeanor complaints filed," Mateljan said. "We filed an amended complaint that we're expecting will be approved at the next court date that will bring it up to four misdemeanor charges. The two original were simple battery and false imprisonment. The two we amended were assault with a deadly weapon and trespassing."

Mateljan could not identify the weapon used in the attack.

"The charge of false imprisonment stems from Ms. Fishburne dragging the victim into the bathroom where the assault continued," the spokesman added. "It's my understanding that the victim sustained significant injuries during the assault."

Her beau, Jerome Greene, was also charged in the incident but did not enter the home.

"He was originally charged with domestic battery and criminal threats as well as making annoying and threatening telephone calls," noted Mateljan. "Ms. Fishburne was charged with trespass; Mr. Greene was not. He pleaded no contest to the domestic battery and is currently on probation."

Fishburne, who is not on speaking terms with her Matrix star papa since announcing a deal to release an X-rated tape through Vivid Entertainment, has also been in trouble with the law before.

As E! News previously reported, Montana pleaded no contest in a Hollywood courtroom to criminal trespass and misdemeanor in a plea deal that saw prosecutors drop charges of solicitation and loitering in a public area for the purpose of prostitution that stemmed from a bust back in November.

The next hearing in the battery case, which is expected to be her arraignment on the additional charges, is set for Aug. 25.

Your information may be shared with other NBCUniversal businesses and used to better tailor our services and advertising to you. For more details about how we use your information, see our Privacy Policy. If you are located outside of the U.S., your information may be transferred to, processed and used in the U.S.